Improvement in planing-machines



w. c. Hamon,

Waning-Machines.

510,147,939 lPaentfsdFeb.24.18711f. i

Va roller.

WILLIAM C. HORTON, OF SALEM, MASSACHUSETTS.

IMPROVEMENT IN PLANING-MCHINES.

Specification forming part of Letters Patent No. 147,939, dated February 24, 1874; application filed i November 19, 1873.

To all whom it may concern:

j Be it known that I, WILLLAM C. HORTON, of Salem, Essex county, State of Massachusetts, have invented Improvements in Planing-Machines, of which the following is a speciiication:

These improvements in planingmachines wholly relate to holding the material to the action of the knives of the rotary cutter 5 and consist of a bar or holder provided with an extension which carries an inwardly-projecting scraper whose edge is in contact with the pressure-roller carried by said bar or holder, in such a manner that the roller is scraped and cleaned while it revolves, to free it from gum or other matter taken from the board being planed, as will be fully hereinafter described. "he invention further consists in arranging a scraper to bear upon the pressure-roller located on the opposite side of the rotary cutter from that above mentioned, and inclosing said roller in a guard or shield, the objects and functions of which will be fully hereinafter explained.

In the accompanying plate of drawings my improvements in planing-machines are illustrated, Figure l being a plan view; Fig. 2, a front view; and Fig. 3 a transverse vertical section, on an enlarged scale, in plane of line x Fig. 1.

As the present improvements in planingmachines wholly relate to the holding of the material to the action of the knives of the rotary cutter, it is not deemed necessary to herein particularly describe the other parts of such machines.

In the drawings, Arepresents the common revolving rotary cutter-head, and B the bed of the machine along which the board to be planed passes in the direction indicated by the arrow, Fig. 3, under the cutter-head A for being planed by the knives of such head. G, This roller C is arranged within the concavity D of a bar, E, and at each of its ends it is hung to the bar, to freely revolve. The periphery of the roller C projects beyond the open face F of the bar, and each end of the carrying bar or holder E is iirmly secured to a similar circular-shaped arm, G, which arms G are hung, as ordinarily, to the l carrying-frame of the rotary cutter, bringing the roller G to a bearing on the unplaned surface of the board, as at a, in advance of the cutting-plane of the revolving cutter-head. The rollerCis held to its bearing on theboard,

as stated, by a yielding pressure produced by the spiral springs G2. The bar or holder E extends from the line of pressure of the rollerG upon the board, toward the cutting-plane of the rotary cutter-head, and this extension H is constructed as shown-that is, in its projection, to be above, and clear, and free of the boardsurface. b,ascraperblade.. This scraper b is secured to and along the extension of bar E, and has its edge c in contact with the roller periphery, just above its. contact with the board. This scraper b is for scraping the roller as it revolves, and thus to clean and clear it of gum, or other matter, which may become attached to it from running in contact with the board. I, a roller. This roller I is located for pressure upon the planed surface of the board, and in such location it is applied to the parts of the machine carrying the rotary cutter-head, and adapted through springs J for an elastic or yielding pressure action. K, a hood encircling the side of the pressure-roller I, toward the rotary cutterhead. This hood is made of spring metal, and is secured to the holder for the roller I, and, by its lower edge f, it rests, as shown, upon the board. L, a scraper secured to holder of roller I, so as to bear directly upon the upper side of the roller. This scraper L not only scrapes, and thus keeps, the roller clean from gum, &c., but, as it rests upon the roller at its upper edge, also holds the roller the firmer against chatter. The hood K guards the pressureroller I against the passing of chips under it, which, were it not used, would pass under the roller, and thus byit be pressed into the planed surface, injuring its smoothness and evenness.

' The pressure-roller C holds the boardfirmly to the action of the rotary critter-head, and at the same time offers substantially no resistance to the travel of the board along to the cutter-head. The described extension H of the bar or holder E for the roller, prevents, in a substantial degree, the unseating of shakes and irregular iiber, and other irregularities in the board being planed, for the reason that, lying above the board, as described, it is a wall or barrier to the lifting of them, to any Y ms@ sion H, and inwardly-projecting scraper bWith its edge c, in contact with the pressure-roller C, all constructed and combined to operate in the mannerv and for the purpose herein described.

2. The scraper L bearing upon the upper side of the pressure-roller I, in combination With the spring metal hood K encircling the pressure roller, substantially as herein described, for the object specified.

The above specification of my invention signed by ine this 5th day of November, A. D. 1873.

VILLIAM C. HORTON.

lVitnesscs:

EDWIN WV. BROWN, J. P. MCELROY. 

